Daikin SM-12-012, Service Manual

Page: 13 / 54

Service Manual SM-Inverter_(i) 13
DISCHARGE PIPE TEMPERATURE CONTROL
- Used as a measure of the compressor’s internal temperature.
- Compressor frequency is control to keep this temperature from going up further when it rises above a
certain level.
- If compressor discharge temperature >102°C (111°C) for the first time, this control starts and set the
current frequency as upper limit. At the same time, running frequency start to reduce by 1 step and so on,
until temperature falls between 99°C (109°C)and 90°C (107°C) – at the maintain zone.
- This protection is activated when the compressor discharge temperature > 110°C (120°C). The
compressor will stop and considered trip.
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- If the compressor discharge temperature < 90°C (107°C), the compressor frequency will be reset based
on the OD ambient, set and room temperature.